Flexible phase change materials: Preparation, properties and application

Zhao, Xiangyu; Zou, Deqiu; Wang, Shuo

doi:10.1016/j.cej.2021.134231

Cited by 69 publications

(22 citation statements)

References 117 publications

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“…Among various TES strategies, a phase change material (PCM) is a competitive option by virtue of its high latent heat storage density, stimuli responsiveness, and reversible thermal regulating capability. , PCMs are capable of storing and releasing latent energy during a phase transition at almost a constant temperature. Combining PCMs with clothing can render a temporary cooling or heating effect in a microclimate to enhance target thermal comfort. − In order to solve the leakage issue of PCMs, form-stable PCMs (FSPCMs) have been developed by physical blending or chemical modification for the advantages of versatile fabrication, desirable dimensions, and cost-effectiveness . FSPCMs are mainly composed of a functional component and a supporting material.…”

Section: Introductionmentioning

confidence: 99%

“…The sacrificial H-bond provides a certain interaction for the insertion of PEG. Because most of the biodegradable materials have weak mechanical properties 39 and because of the universal low thermal conductivity of PCMs, 15 reinforcing additive carbon nanotubes (CNTs) with high thermal conductivity had been introduced into the matrices to promote tensile strength and heat transfer rate. In addition, the intrinsical hydrophilicity of waterborne polymers will suffer water absorption, swelling, and disintegration when in contact with water.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ultraflexible, Breathable, and Form-Stable Phase Change Fibrous Membranes by Green Electrospinning for Personal Thermal Management

Wang

Dong

et al. 2022

ACS Sustainable Chem. Eng.

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Advanced textiles for personal thermal management (PTM) are more precise and energy-saving than traditional heating/cooling strategies. Applying phase change materials (PCMs) in PTM is sustainable and effective but challenging due to the intrinsic rigid character of PCMs and the leakage issue in phase transition. In this work, we employed poly(ethylene glycol) (PEG) as a functional material and poly(vinyl alcohol) (PVA) as a polymer skeleton by green electrospinning to endow the composite membranes with superior flexibility, breathability, and thermal regulation capability. The introduction of carbon nanotubes (CNTs) promoted the mechanical properties and thermal conductivity of the prepared membranes. The thermal conductivity of resultant membranes was enhanced by 40.4% with only 1.5% weight content of CNTs. Furthermore, surface chemical cross-linking was applied to improve water-resistance properties and minimize the confinement on the PEG segment. The prepared membranes have a reasonable temperature range (∼26.9–38.9 °C) in the phase change process with a melting latent heat of 60.1 J/g and freezing latent heat of 59.1 J/g as the mass ratio of PEG reached 55 wt %. These flexible fibrous membranes with optimal energy storage capacity and eco-friendly characteristics indicate they will be a promising candidate for personal thermal management.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Ultraflexible, Breathable, and Form-Stable Phase Change Fibrous Membranes by Green Electrospinning for Personal Thermal Management

Wang

Dong

et al. 2022

ACS Sustainable Chem. Eng.

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“…[45,54] Currently, there are three main routes to fabricate flexible PCMs, including encapsulation, porous supporting skeleton, and polymer structure. [54,55] For the former two routes, flexibility stems from the elastic shell layer and flexible porous skeleton. Encapsulated flexible PCMs are commonly fabricated by packing organic PCMs into diversified flexible shell materials, such as silicone elastomers [56] and poly(butyl acrylate-comethyl methacrylate), [57] imparting desirable leakage-proof and deformation-resistant abilities to rigid PCMs.…”

Section: Flexible Pcmsmentioning

confidence: 99%

Exploring Next‐Generation Functional Organic Phase Change Composites

Zhou

Yang

Feng

et al. 2022

Adv Funct Materials

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As one of the main forms and intermediate carriers of energy, it is impressive to expand the application scope of heat energy, thereby boosting innovations in heat harvesting, conversion, storage, regulation, and utilization associated with the relevant techniques. Phase change materials (PCMs), as a state-of-the-art latent heat storage technique, have garnered increasing interest in heat-related applications over the past decades, and abundant high-performance PCMs with excellent shape stability and salient thermal conductivity have been developed. This review focuses on the issues concerning organic PCMs from the perspectives of flexible, multifunctional, and smart phase change composites, along with emerging applications and processing technologies, which are expected to offer possible guidance for the exploration of next-generation advanced functional phase change composites.

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“…Phase change materials (PCMs) capable of absorbing and releasing heat energy are attractive for maintaining a constant temperature in the PTM field. However, the inherently solid rigidity and liquid leakage of PCMs hinder their applications in the wearable thermal regulation field. − Numerous form-stable strategies have been committed to improving the packaging efficiency of PCMs, such as the 3D aerogel network, − the polymer-cross-linked skeleton, − microencapsulation, − and others. The aforementioned methods based on capillary absorption in a porous structure still possess leakage threats at high temperature, and the other methods that depend on covalent cross-linking are prone to constrain the movement of molecular chains between amorphous and crystalline phases extensively, leading to deteriorated heat enthalpy of PCM composites.…”

Section: Introductionmentioning

confidence: 99%

A Trimode Thermoregulatory Flexible Fibrous Membrane Designed with Hierarchical Core–Sheath Fiber Structure for Wearable Personal Thermal Management

Wang

Dong

et al. 2022

ACS Nano

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Advanced textiles designed for personal thermal management contribute to thermoregulation in an individual and energy-saving manner. Textiles incorporated with phase changing materials (PCMs) are capable of bridging the supply and demand for energy by absorbing and releasing latent heat. The integration of solar heating and the Joule heating function supplies multidriving resources, facilitates energy charging and storage, and expands the service time and application scenarios. Herein, we report a fibrous membrane-based textile that was developed by designing the hierarchical core−sheath fiber structure for trimode thermal management. Especially, coaxial electrospinning allows an effective encapsulation of PCMs, with high heat enthalpy density (106.9 J/g), enabling the membrane to buffer drastic temperature changes in the clothing microclimate. The favorable photothermal conversion performance renders the membrane with the high saturated temperature of 70.5 °C (1 sun), benefiting from the synergistic effect of multiple light harvesters. Moreover, a conductive coating endows the composite membrane with an admirable electrothermal conversion performance, reaching a saturated temperature of 73.8 °C (4.2 V). The flexible fibrous membranes with the integrated performance of reversible phase change, multi-source-driven heating, and energy storage present great advantages for all-day, energy-saving, and wearable individual thermal management applications.

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Flexible phase change materials: Preparation, properties and application

Cited by 69 publications

References 117 publications

Ultraflexible, Breathable, and Form-Stable Phase Change Fibrous Membranes by Green Electrospinning for Personal Thermal Management

Ultraflexible, Breathable, and Form-Stable Phase Change Fibrous Membranes by Green Electrospinning for Personal Thermal Management

Exploring Next‐Generation Functional Organic Phase Change Composites

A Trimode Thermoregulatory Flexible Fibrous Membrane Designed with Hierarchical Core–Sheath Fiber Structure for Wearable Personal Thermal Management

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